Decide Whether the Following Is an Expression or an Equation $\frac{1}{3} x-\frac{2}{5} x+\frac{4}{15} x-1$

Multiple Choice

Decide whether the following is an expression or an equation. Simplify any expression or solve any equation.
- $\frac{1}{3} x-\frac{2}{5} x+\frac{4}{15} x-1$

A) Equation; $\left\{\frac{1}{3}\right\}$

B) Expression; $\frac{1}{5} x-1$

C) Expression; $\frac{3}{5} x-1$

D) Equation; $\left\{-\frac{1}{3}\right\}$